Fireproof door.



No. 653,400. Patented July l0, I900. .1. w. RAPP.

FIREPBOOF DOOR. pplication 119d Dec. 1a 899 OOOOOO I.)

a a} a, a/ a WITNESSES: a; as a INVENTOR H 15 ATTORNEY UNITED STATESATEINT FFICE..

JOHN W. RAPP, OF NEW YORK, N. Y.

FIREPROOF DOOR.

SPECIFICATION forming part of Letters Patent No. 653,400, dated July 10,1900.

Application filed December 18, 1899. Serial No. 740,656. (No model.)

To all whom 2P1, may concern:

Be it known that I, JOHN W. RAPP, a citizen of the United States,residing in the borough of Manhattan, city, county, and State of NewYork, have invented certain new and useful Improvements in FireproofDoors, of which the following is a specification.

My invention relates to fireproof doors.

I will describe a fireproof door embodying my invention and then pointout the novel features thereof in the claims.

In the accompanying drawings, Figure 1 is a front elevation of afireproof door embodying my invention. Fig. 2 is a vertical sectionalview of Fig. 1. Fig. 3 is a horizontal sectional view.

Similar letters of reference designate corresponding parts in all of thefigures.

A represents a fireproof door comprising a core or filler a and ametallic covering which completely incloses the core or filler. In thepresent instance the metallic covering consists of a front and a back,each of which is made up of a number of panels and conn ecting-rails,both Vertical and horizontal.

a represents the panels, a the horizontal connecting-rails, and or thevertical connecting-rails. The panels a are stamped into shape and eachis provided with a peripheral or marginal lip 64 preferably of the formshown. This lip may be either continuous or interrupted. The rails a 0bare also provided with peripheral or marginal lips a, which engage withthe lips of the panels. The lips on the rails may be either continuousor interrupted, according to the lips on the flanges.

a represents the top and bottom rails, and a the stiles. The top andbottom rails are formed to fit over the top and bottom edges of the coreor filler, and the stiles are formed to fit over the side edges of thecoreor filler. As shown, these parts have an outline in cross-sectionsimilar to a U. Each face of the top and bottom rails and the stiles ispro- Vided with a marginal lip a. These lips may be either continuous orinterrupted, and they engage with the adjacent lips a of the panels andrails, as shown.

In making the fireproof door the panels a are secured in position byblind-nailing them, and the connecting-rails are next secured in placebyhaving their lips engage with the lips of the panels. The top andbottom rails and the stiles are applied to the core in the same manner.The seams formed by the engaging lips are preferably flattened by meansof a mallet or other device. The joints formed by the connecting partsmay be closed by welding. Any well-known electric apparatus may be used.

What I claim as my invention is- 1. The combination in a fireproof door,of a core or filler and a metallic covering therefor, said coveringcomprising front and back panels and connecting-rails, and top andbottom rails and stiles for fitting over the edges of the core orfiller.

2. The combination in a fireproof door, of a core or filler and ametallic covering therefor, said covering comprising front and backpanels, each having marginal lips, connecting-rails, having marginallips which engage with the marginal lips of the panels, and top andbottom rails and stiles fitting over the edges of the core or fillerandconnected with adjacent panels and connecting-rails.

3. The combination in a fireproof door, of a core or filler and ametallic covering there for, said covering comprising front and backpanels, each having marginal lips, connecting-rails having marginal lipswhich engage with the marginal lips of the panels, and top and bottomrails and stiles fitting over the edges of the core or filler, said topand bottom rails and stiles being each provided with marginal lips whichengage with the lips of adjacent panels and connecting-rails.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN W. RAPP.

Witnesses:

GEO. E. ORUsE, DONALD CAMPBELL.

